Node.js feature livecoding

on YouTube ↗56m

" summary

Live-coded a from-scratch Node.js timer that actually reimplements setTimeout, showing C++ bindings into V8 and libuv, the timer_wrap C++/JS hybrid, and the glue that wires a UV timer to a JavaScript callback. Demonstrates async tracking exposed to Chrome DevTools, runs unit tests, and measures that a naive UV-per-timer approach is orders of magnitude slower while Node’s real implementation groups timers for efficiency — reimplement setTimeout, libuv and V8.

AI-written summary · about

" chapters (8)

1. 0:00Start
2. 2:37How did I get into Node.js core?
3. 5:09Node.js feature: setTimeout()
4. 9:34Data stored for a timer
5. 11:02Node.js internal helpers in fake JS
6. 17:59What we want to write in C++ (in JS)
7. 19:56Node.js layers
8. 37:34A note on performance

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